:root { color-scheme: dark; }
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem;
  background: #0b1020;
  color: #e8ecf8;
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
}

main {
  max-width: 34rem;
  text-align: center;
  padding: 3rem 2.5rem;
  border: 1px solid #1f2a44;
  border-radius: 1rem;
  background: linear-gradient(160deg, #121a33, #0d1428);
}

.badge {
  display: inline-block;
  margin-bottom: 1.25rem;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  background: #1b3a2a;
  color: #6ee7a8;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 { font-size: 2.25rem; margin-bottom: 0.75rem; letter-spacing: -0.02em; }
p { color: #9fb0d0; margin-bottom: 1rem; }

.stamp {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.8rem;
  color: #5d7099;
}

.cta {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.7rem 1.4rem;
  border-radius: 0.6rem;
  background: #2f6bff;
  color: #fff;
  font-weight: 600;
  text-decoration: none;
}
.cta:hover { background: #4880ff; }